Air conditioning apparatus



Sgept. 20, 1938. A. M. KOL-STAD 2 (AIR CONDITIONING APPARATUS ;Filed July 19, 1955 s Sheets-Sheet 1 1 T j .4 m l N) lNVENTQR AUGUST M. KOLSTAD al A ATTORNEY Sept. 20, 1938. A. M. KOLSTAD- 2,130,630

AIR CONDITIONING APPARATUS Filed July 19, 1935 3 Sheets-Sheet 2 ATTO'RNEY Sept. 20, 1938.

A. M. KOLSTAD AIR CONDITIONING APPARATUS I5 Sheets-Sheet 3 Filed July 19, 1935 I v INVENTOR AUGUST KOLSTAD.

ATTORNEY Patented Sept. 20, 1938 PATENT OFF-ICE 2,130,630 AIR CONDITIONING AIPARAT'U S August M. Kolstad, Detroit, Mich assignor to Domestic Air Conditioning Company, Highland Park, Mich, a corporation of Michigan Application July 19, 1935, Serial No. 32,219

2Claim8.

This invention relates to air conditioning apparatus and particularly to apparatus in which a blower delivering air is combined in a unitary relation with means for filtering and humidifying the air and means for heating or cooling the air.

An object of the inventionis to deliver the air to be conditioned through an improved and highly efiicient heat exchanger.

Another object is to associate means for humidifying; filtering and cooling air in a novel relation with a means for inducing air flow.

These and various other objects are attained by the construction hereinafter described and illustrated in the accompanying drawings, where- Fig. 1 is a view in longitudinal vertical section of the improved air conditioning apparatus.

Fig. 2 is a horizontal sectional view of the apparatus, taken upon the line 2--2 of Fig. 1.

Fig. 3 is another horizontal sectional view of the apparatus, taken upon the line 3-3 of Fig. 1.

Fig. 4 is a perspective view of the heat exchanger employed in the apparatus.

Fig. 5 is a vertical cross section, taken upon the line 5-5 of Fig. 1.

In these views; the reference character I desig-' nates a rectangular sheet metal casing which is divided by a vertical partition 2 into two compartments 3 and 4, the casing top having an inlet 5 to the compartment 3 for unconditioned air and an outlet 6 from the compartment 4 for condiand having an imperforate bottom It and fo-v raminous side walls Illa. Said walls are spaced from the partition 2 and opposite end wall of the casing to form air passages lllb. In thetop portion of said box is mounted a spray head II to which water may be continuously supplied by a pipe l2, the spray discharging both downwardly and laterally from said head so as to engage two tiers of vanes 12a arranged in vertically spaced relation upon foraminous walls l2b, spaced inwardly from the walls "a. Between the walls .downwardly in extensive contact with the air, as

well as dripping from vane to'vane. The air escapes from the humidifier and filter box into the passages lllb whence it is drawn into the lower portion of the chamber 3 by the blower. The foraminous walls la and 12band the shredded glass bodies I3 act to filter the air. Surplus water is drawn off from the bottom of the box through a drain pipe 44. A door l5 mounted in one side wall of the casing I gives ready access to the humidifier for cleaning or inspection, and

further provides for placing in the box l0, Illa a cake of ice l6, in case it is desired to cool and de- 15 humidity theair. A support l1, raising the ice cake above the box bottom, may be interlorly secured to said bottom.

Within the compartment 4 and spaced from the walls thereof is a rectangular sheet metal heat exchanger, the lower portion whereof forms a combustion chamber l8. Between said chamber and an end wall or the casing I there is installed a gas or oil burner l9 discharging into said chamber and of any suitable construction, and a door 20 in said endwall gives access to such burner. From said combustion chamber there rises a flue 2|, inclined away from the partition wall 2 and leading to one of two horizontally spaced headers 22 and 23 arranged in the top portion of the compartment 4. Said headers are connected by a considerable number of fiues 24 spaced above the combustion chamber, and spaced from eachother to form passages 25 for the up-flow of air. From the header 23 a pair of horizontally spaced fiues 36 26 extend downwardly engaging but not communicating with the combustion chamber, and

from the lower portion of each such fiue, an outlet 21 for gases of combustion opens through the adjacent side walls of the casing I. The outlet 21 of either fiue may-be capped as indicated at 28, and a plurality of vertically spaced fiues 29 connecting the two down-fiues provides for a flow of the gases from the flue soclosed to the other outlet 21. 1

In use of the described apparatus the air discharged from the blower 1 passes largelybetween the cross fiues 29 and to the conditioned air outlet i by way of the vertical passages 25. A portion of the air however, circulates around the heat exchangerthroughthe space 30 surrounding the heat exchanger, and rises from such space to the outlet 6.

The arrangement is such that a very extensive surface area is provided for transferring heat from the combustion gases to the air stream flownsto the outlet 8.

It will, of course, be understood that the burner is is used only when warm air is required, and that ice is employed in the box ll, lfla only when it is required to cool or dehumidlty the air delivered by the apparatus. a The described location of the humidifier and filter permits its installation as a readily accessible unit distinct from the heat exchanger, and the use of the space within the humidifier for air coolingpurposes permits a convenient use of ice to cool or dehumidity the air and adds to the compactness of the apparatus. 7 I

What I claim is:

1. An'air conditioning apparatus comprising a combustion chamber, a plurality of flues spaced above the combustion chamber, and spaced from each other to form substantially vertical air passages, a pair of headers connected by said flues, a flue delivering gases from the combustion chamber to one of said headers, apair or spaced flues downwardly extending from the other header, one of said downwardly extending flues having an outlet for gases, a plurality of vertically spaced flues connecting the two downwardly exber disposed substantially beneath and spaced from one or said headers, a pair of flues downwardly extending from the last-mentioned header and supported upon the combustion chamber,

said flues being spaced apart toform an air passage and having oppositely directed openings,

- serving as alternative outlets, and a flue extending laterally and upwardly from the furnace chamber to the other of said headers.

AUGUST M. KOLSTAD. 

